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tcp: add send_synack method to tcp_request_sock_ops 

Create a new tcp_request_sock_ops method to unify the IPv4/IPv6
signature for tcp_v[46]_send_synack. This allows us to later unify
tcp_v4_rtx_synack with tcp_v6_rtx_synack and tcp_v4_conn_request with
tcp_v4_conn_request.

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Octavian Purdila 2014-06-25 17:09:58 +03:00 committed by David S. Miller
parent 936b8bdb53
commit d6274bd8d6
3 changed files with 17 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/tcp.h
View File

@ -1609,6 +1609,9 @@ struct tcp_request_sock_ops {
const struct request_sock *req,
bool *strict);
__u32 (*init_seq)(const struct sk_buff *skb);
int (*send_synack)(struct sock *sk, struct dst_entry *dst,
struct flowi *fl, struct request_sock *req,
u16 queue_mapping, struct tcp_fastopen_cookie *foc);
};
#ifdef CONFIG_SYN_COOKIES

9
net/ipv4/tcp_ipv4.c
View File

@ -814,6 +814,7 @@ static void tcp_v4_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
* socket.
*/
static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
struct flowi *fl,
struct request_sock *req,
u16 queue_mapping,
struct tcp_fastopen_cookie *foc)
@ -846,7 +847,8 @@ static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
static int tcp_v4_rtx_synack(struct sock *sk, struct request_sock *req)
{
int res = tcp_v4_send_synack(sk, NULL, req, 0, NULL);
const struct tcp_request_sock_ops *af_ops = tcp_rsk(req)->af_specific;
int res = af_ops->send_synack(sk, NULL, NULL, req, 0, NULL);
if (!res) {
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
@ -1285,6 +1287,7 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = {
#endif
.route_req = tcp_v4_route_req,
.init_seq = tcp_v4_init_sequence,
.send_synack = tcp_v4_send_synack,
};
int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
@ -1404,8 +1407,8 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
tcp_openreq_init_rwin(req, sk, dst);
fastopen = !want_cookie &&
tcp_try_fastopen(sk, skb, req, &foc, dst);
err = tcp_v4_send_synack(sk, dst, req,
skb_get_queue_mapping(skb), &foc);
err = af_ops->send_synack(sk, dst, NULL, req,
skb_get_queue_mapping(skb), &foc);
if (!fastopen) {
if (err || want_cookie)
goto drop_and_free;

14
net/ipv6/tcp_ipv6.c
View File

@ -470,13 +470,14 @@ out:
static int tcp_v6_send_synack(struct sock *sk, struct dst_entry *dst,
struct flowi6 *fl6,
struct flowi *fl,
struct request_sock *req,
u16 queue_mapping,
struct tcp_fastopen_cookie *foc)
{
struct inet_request_sock *ireq = inet_rsk(req);
struct ipv6_pinfo *np = inet6_sk(sk);
struct flowi6 *fl6 = &fl->u.ip6;
struct sk_buff *skb;
int err = -ENOMEM;
@ -507,10 +508,11 @@ done:
static int tcp_v6_rtx_synack(struct sock *sk, struct request_sock *req)
{
struct flowi6 fl6;
const struct tcp_request_sock_ops *af_ops = tcp_rsk(req)->af_specific;
struct flowi fl;
int res;
res = tcp_v6_send_synack(sk, NULL, &fl6, req, 0, NULL);
res = af_ops->send_synack(sk, NULL, &fl, req, 0, NULL);
if (!res) {
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSYNRETRANS);
@ -754,7 +756,6 @@ static struct dst_entry *tcp_v6_route_req(struct sock *sk, struct flowi *fl,
return inet6_csk_route_req(sk, &fl->u.ip6, req);
}
struct request_sock_ops tcp6_request_sock_ops __read_mostly = {
.family = AF_INET6,
.obj_size = sizeof(struct tcp6_request_sock),
@ -776,6 +777,7 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
#endif
.route_req = tcp_v6_route_req,
.init_seq = tcp_v6_init_sequence,
.send_synack = tcp_v6_send_synack,
};
static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
@ -1128,8 +1130,8 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
tcp_openreq_init_rwin(req, sk, dst);
fastopen = !want_cookie &&
tcp_try_fastopen(sk, skb, req, &foc, dst);
err = tcp_v6_send_synack(sk, dst, &fl6, req,
skb_get_queue_mapping(skb), &foc);
err = af_ops->send_synack(sk, dst, (struct flowi *)&fl6, req,
skb_get_queue_mapping(skb), &foc);
if (!fastopen) {
if (err || want_cookie)
goto drop_and_free;